How to make a Get lastRow in 1 colum

[Teguh_Sampurna]

i have some database Spreadsheet for my kodular Apps. what if you want to enter data that is in the script only up to column K data, but does not follow the number of lastrows in L

with this code

its gonna be like this

i want like this

is this possible or not?
sorry my english so bad

[Mr_YouTuber_Official]

Simply .
Get all rows and check how many rows get for example spreadsheet got 90 rows mean then if you want to add new row set index to 91 ..